'Whistle-Blower' Provision Cited

Two senators are urging Securities and Exchange Commission Chairman William Donaldson to "vigorously" enforce a provision of the Sarbanes-Oxley law that protects corporate whistle-blowers.

Sens. Patrick Leahy (D., Vt.) and Charles E. Grassley (R., Iowa) sent a letter to Mr. Donaldson last week asking what steps the agency is taking to investigate companies accused of retaliating against employees who expose wrongdoing. The lawmakers want to know whether any investigations have been spawned by the new law and if...